Homework Help:
Zincate formation

1. The problem statement, all variables and given/known data
What are the physical and chemical changes that occur when NaOH and Zn react.?Also how do this reaction differ from the reaction of Zn and HCl?

I do know that zincate is formed in the first and H2 is evolved in the second .But as i have no time to go and perform in the lab...thus please tell me about the colour changes of solution,any deposition,cause and effect of these reactions.